Insecticide



Patented Feb. 24, 1931 UNITED STATES PATENT OFFICE INSECTICIDE NoDrawing. Application filed Kay 31, 1828,

The invention relates to new insecticides and is based on theobservation that aromatic monothiocyanates, the derivatives andsubstitution products ofthese thiocyanates are extraordinarily active inThese comparatively difl'icultly volatile thiofor example,benzylthiocyanate, thiocyanoamhne, thiocyanohydroxynaphthainsecticidesexceeds considerably that of insecticides hitherto They do not damageplants; they may be applied in any, esired manner, for example,

a usual diluent, b fumigation or by spraying in the form of a solutionor emulsion.

The following examples illustrate the in vention:

Example 1.-A mixture of 5 parts of benzylthiocyanate and 95 parts oftalc are 2 mixed to form a dusting agent. This suffices to kill in avery short time the larva and imagines of Piesma quadrata, whichhitherto has not been possible with any synthetic agent. i I

The same action is obtained, for example, by use of thiocyanoaniline.

Example 2.-A solution is made by stirring together, while heating, 144parts of colophony, 68 parts of caustic soda lye of per cent. strength,100 parts of alcohol, 82 parts he first runnings of benzenedistillation, 28 parts of 20 parts of benzylthioe activity of theseSerial No. 282,037, and in- Germany August 8,

by scattering in conjunction with,

parts by water. A solution of 1-2 pe strength of this stock preparationyields an excellent spraying agent bugs or lice.

It is obvious to all skilled in the art that the present invention isnot limited to the oregoing examples or to the details given therein.The effective thiocyanates may be used in a mixture With other knowninsecticides, other diluents may be added.

hat We claim is:

As an insecticide a preparation containing as an active constituent an:ammatio monothiocyanate.

As an insecticide a preparation containing as an active constituent anaromatic monothiocyanate of the benzene series.

s an insecticide a preparation containing as an active constituentbenzene thiccyanate.

4. As an insecticide a preparation containing five parts of benzenethiocyanate and 95 parts of talc powder.

As an insecticide a preparation containing benzylthiocyanate, colophonysoa alco- 01 and compounds consisting of t e first runnings of benzenedistillation.

As an insecticide a preparation contaim ing thioeyanoaniline,benzylsulfocyanate dissolved in alpha-chloronap thalene and butylalcohol, and an emulsifying agent. In testimony whereof, we aflix oursignatures HANS WESCHE. KARL BRODERSEN. WERNER EXT.

for exterminating

